title: Rapid quantitative determination of hydrogen peroxide by oxidation decolorization of methyl orange using a Fenton reaction system.
abstract: In this study, a sensitive and rapid method for hydrogen peroxide (H(2)O(2)) determination has been developed with the aid of oxidation decolorization of methyl orange (MO) by using Fenton reactions, because the decolorization extent of MO solution (at the maximum absorption wavelength of 507 nm) is proportion to the concentration of H(2)O(2). Under optimum conditions, this spectrophotometric method for the H(2)O(2) analysis yields a dynamic range of H(2)O(2) concentration from 5.0 x 10(-7) to 1.0 x 10(-4) mol L(-1) (r=0.997) and a detection limit (3 sigma/k) of 2.0 x 10(-7) mol L(-1). This method for the determination of H(2)O(2) (0.04 mmol L(-1)) is able to tolerate the interference from NaCl (0-5.0 mmol L(-1)), Na(2)SO(4) (0-5.0 mmol L(-1)), MgCl(2) (0-5.0 mmol L(-1)), sodium humate (0-0.1 mmol L(-1)), benzene (0-0.2 mmol L(-1)), toluene (0-0.2 mmol L(-1)), chlorobenzene (0-0.2 mmol L(-1)) and chloroform (0-0.2 mmol L(-1)). The analysis results for practical rainwater samples are in good agreement with the classical N,N-diethyl-p-phenylenediamine (DPD) method for H(2)O(2) determination.
authors.affiliation: Department of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
authors.forename: Wei
authors.initials: W
authors.lastname: Luo
authors.forename: M E
authors.initials: ME
authors.lastname: Abbas
authors.forename: Lihua
authors.initials: L
authors.lastname: Zhu
authors.forename: Kejian
authors.initials: K
authors.lastname: Deng
authors.forename: Heqing
authors.initials: H
authors.lastname: Tang
mesh_terms: D000042:Absorption; D001391:Azo Compounds / Q000737:chemistry*; D002138:Calibration; D005296:Ferrous Compounds / Q000737:chemistry; D006861:Hydrogen Peroxide / Q000032:analysis* / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D013053:Spectrophotometry; D013997:Time Factors
chemical_list: D001391:Azo Compounds; C045076:Fenton's reagent; D005296:Ferrous Compounds; C100258:methyl orange; D006861:Hydrogen Peroxide; D007501:Iron